ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In present work, ultra-fine powders with alpha phase content higher than 95 wt% and specificsurface area of 15.33 m2/g were prepared by mechanical activated combustion synthesis (MACS) process.The sinterability of as-fabricated Si3N4 as well as the microstructure and mechanical properties of thesintered bulk were investigated by comparing with a kind of commercial available Si3N4 powders used asdiluents in MACS process. Employing hot-pressing method, both powders were sintered equally by usingY2O3 and Al2O3 as sintering aids. Results showed that smaller particle size and higher specific surfacearea were obtained by MACS process when compared with the commercial one. Bulk Si3N4 appearedapproximately the same relative density, hardness, strength and fracture toughness, however, proved to behigher while using MACS powders
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1179.pdf
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